Journal article
Linear seakeeping and added resistance analysis by means of body-fixed coordinate system
This paper presents an alternative formulation of the boundary value problem for linear seakeeping and added resistance analysis based on a body-fixed coordinate system. The formulation does not involve higher-order derivatives of the steady velocity potential on the right-hand side of the body-boundary condition, i.e., the so-called m j -terms in the traditional formulation when an inertial coordinate system is applied.
Numerical studies are made for a modified Wigley I hull, a Series 60 ship with block coefficient 0.7, and the S175 container ship for moderate forward speeds where it is thought appropriate to use the double-body flow as basis flow. The presented results for the forced heave and pitch oscillations, motion responses, and added resistance in head-sea waves show good agreement with experiments and some other numerical studies.
A Neumann–Kelvin formulation is shown to give less satisfactory results, in particular for coupled heave and pitch added mass and damping coefficients.
Language: | English |
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Publisher: | Springer Japan |
Year: | 2012 |
Pages: | 493-510 |
Journal subtitle: | Official Journal of the Japan Society of Naval Architects and Ocean Engineers (jasnaoe) |
ISSN: | 14378213 and 09484280 |
Types: | Journal article |
DOI: | 10.1007/s00773-012-0185-y |